PT Indosat Tbk. (commonly referred to as Indosat Ooredoo, formerly Indosat) is one of the telecommunications services and networks providers in Indonesia. The company offers communication services for mobile phone users, both for prepaid and postpaid, under the brands, Matrix Ooredoo, Mentari Ooredoo and IM3 Ooredoo. The company also provides other services, which are fixed voice services (including International Direct Dialing/IDD) and Multimedia, Internet, and Data Communication Services/MIDI.